Water is generally disturbed by bathers and surroundings elements. It is therefore essential that it is checked and treated regularly. Disinfection must be ongoing to prevent microorganisms from proliferating. A constant chlorine level needs to be present in the water to protect anybody who will use the pool.

There are 2 families of chlorine products for your swimming pool water treatment:

• Stabilised chlorine products
• Unstabilised chlorine products

The most commonly used chlorine is stabilised chlorine.
Stabilised chlorine (blue label) is chlorine that releases a stabiliser (cyanuric acid). This stabiliser protects the chlorine from the destructive action of the ultraviolet radiation in sunlight. However, too high a concentration of stabiliser in the water can reduce the effectiveness of the chlorine, and in this case the water quickly becomes green and cloudy. This is known as overstabilisation. To avoid overstabilisation problems, use unstabilised chlorine (chlorine that contains no stabilizer). You can use and dose hth STABILIZER separately as required to protect the action of the chlorine from ultraviolet light.

To guarantee healthy water, opt for hth Stick. This product is very easy to use: after adjusting your pH to between 7.0 and 7.4, take one stick per 20 m³ of water and place it directly in the skimmer(s), provided the skimmers do not contain stabilised chlorine. Then, approximately every 4 to 5 days, as required adjust the number of sticks you add to maintain a level of available chlorine (DPD1 tablet) above 2 mg/l. This will give you 7 days of treatment. Now you can lay back and enjoy your swimming pool.

To complement hth unstabilised chlorine (red label), and to provide maximum protection against the destructive action of ultraviolet light, use hth STABILIZER. To obtain a stabiliser concentration of 10 mg/l, add 100 g of hth STABILIZER for every 10m³ of water to the pump's pre-filter. The recommended ideal value is 60 mg/l of stabiliser.

To deliver a shock chlorination in order to increase the chlorine level quickly, use hth Shock.

Warning! Do not mix solid stabilised chlorine (blue hth label, trichloroisocyanuric acid or sodium dichloroisocyanurate dihydrate) with chlorine that does not contain stabiliser (red hth label, calcium or lithium hypochlorite).